Over-the-counter hay fever drug shows remyelination promise on MRIPublished: 21 June 2023 Scientists have shown that over-the-counter antihistamine clemastine has the ability to repair myelin damage from multiple sclerosis (MS) on an MRI scan. The researchers said this is the first time brain repair has been documented on an MRI scan for a chronic neurological condition. The non-invasive MRI method more accurately reflects the repair of myelin that other methods. The study was placebo-controlled and looked at data from 50 adults who took part in the Phase 2 ReBUILD trial. They had relapsing remitting multiple sclerosis and were on immune-modulating disease-modifying therapies. The results showed the clemastine helped speed up the electrical signals travelling along the optic nerve connecting the eyes and brain. The findings were modest and the drug does come with undesirable side-effects such as drowsiness. “Clemastine can only be partially effective at the doses we can use,” said the researchers. “It can be sedating, which may be especially undesirable in patients with MS,” Green said. “We are hopeful better medications will be developed, but clemastine has proven to be the tool to show remyelination is possible.” Other Stories You May Be Interested In... News Antibodies detected in blood of 10% of MS patients years before diagnosis View article News Stroke risk higher in people with MS, study finds View article News Subcutaneous Ocrevus shows almost complete suppression of relapses View article